Being offensive is not necessarily funny. Just ask Carlo Mencia. But a truly skilled comedian can make you laugh at the most appalling things. And when it comes to walking the fine line between witty and revolting, few are more skilled than David Cross.Just imagine Jerry Seinfeld telling a joke about Martin Luther King Jr. and a vanity license plate that reads "NGR LVR." Or try to picture Jay Leno doing a bit where a deaf man tells Jew jokes to a delighted audience, only to be shouted down as "an anti-Semitic deaf f**k." David Cross not only gets away with these jokes without offending, but somehow he leaves you wanting more.MORE AFTER THE JUMP.